Non-slipping tread.



Ei E. SGHA'GHNBR NoN- 'PATBNTBD JULY 14, 1908;

SLIPPING TREAD. l

APPLICATION FILED JUNE 17. 1907.

4 SHEETS-SHEET 1v IN VEN TOR.

WJTNESSES.-l

, l PATBNTBD JULY 14, 190s.

B. B. scHAcHNER. NoN-SLIPPING TRBAD.

.APPLIOATIOI-T FILED .TUNE 17. 1907.

4 SHEETS-SHEET 2.

- INVENTOR.

'5. E .Scham/mer WITNEssEs fm2?. 5'? WHW- No. 893,198. PATENTED JULY 14, 1908.

E. E. SCHACHNER.

NoN-SLIPPING TRBAD. APPLICATION FILED JUNE 17. 1907.

4 SHEETS-SHEET 3.'

WITNESSES.- INVENTOR.

l caC/mef A TTORNE Y.

- PATENTED JULY 14, 1908. E. E. SCHAGEN-BR.

NON-SLIPPING TREAD.

APPLICATION FILED JUNE 17. 1907. 4 SHEETS-SHBT 4;

O I IO E' e I o E lOl @o I Y El E 3E '3E 52, a l. u Tja-'U a afa d e f '65 1 51, Se @o @I gra- 'bo @n /WlTNEssEsf I y. E lgI/E/TOR) f .5. c ac ner PATENT euries.

EDWARD EDMND SCHACHNERQOF DENVER, COLORADO.

NoN-SLIPPING 'TRE Ai).

specification of Letters' Patent.

" Patented July 14, 190s.

Application tiled June 17, 1907. Serial No. 379,504.

To all whom t't-mcy concern.'

Be it known that I, EDWARD E. ScHAoH- NER, a citizen of the United States of America, residing at Denver, in the county of Denver and State of Colorado, have invented'cer tain new and useful Improvements in Non- Slipping Treads, of which the following is a specification.

My invention relates to new and useful improvements in non-slipping treads and its object is to provide avsafety ltread which may readily be applied to the'treads of the stepsin a stair structure irrespective of the material of which they are made,` which including a plurality of members supported upon an independent base, mayreadily be removed or renewed in case of wear or breakage and which by reason of the adhesiveness -manners of securing the superposed mem-V of the material of which they are composed, will effectively prevent slipping of persons engaging stairs or other surface to which they are applied. I attain this object by the mechanism illustrated in the accompanying drawings in the various'views of which like parts are similarly designated and in which Figure l-represents a fragmentar sectional elevation'of a stair case provide with my improved tread, Fig. 2-a similar view showing modified forms of safety'tread, sofiit and reinforcement, Fig. 3a fragmentary view of a metallic riser supporting the improved tread, Figs. 4, 6, 8 and 10, fragmentary plan views ofthe detached safety tread showing different manners of securing the superposed vmembers to the base, Fig. 5'-a cross section taken along a line 5 5, Fig. '4, Fig. 7-a transverse section taken along a line 7---7, Fig. 6, Fig. 9-a section along a line 9 9, Fig. 8, Fig. 11-a cross section taken along a line 11-11, Fig. 10, Figs. 12, 14, 16 and IS--fragmentary'planviews of the detached safety treads showing the various bers to the base, the latter being provided with perforations, intermediatey the said members, Fig. 13-a transverse section taken.

along a line 13--13 Fig. 12, Fig. 15-a section along a line 15-15, Fig. 14, Fig. 17 -a cross section taken along a line 17 17, Fig. 16, Fig. 19-a transverse sectionalong the line ]9-19, Fig. 18, Fig. 2(1-a fragmentary plan view of the detachedsafety tread illustrating various methods of securing the members upon the base, through instrumentality of interposed shoes and ridges, and Fig. 21- a section through the tread shown in the preceding gure taken along a line 21-21'- Fig. 20, l' Y Referring to the drawings, the reference numeral 2 designatesv the parallel stringers between which the stairs are supported and which are provided upon their inner surface with inwardly ranging, stepped flanges 3, the

7 of'which are arranged in conformity with the stairsS. t

The members 6 and 7 of the flanges 3 are at the junction'of the lower portion of the vertical arts with the adjacent horizontal parts, o set to form angular seats 9, adapted to receive the extremities of angle bars 10, which being arranged transversely between the two stringere, afford a firm support for the stairs 8', the ends of which abut the vertical surfaces of the latter. The stringers 2 are furthermore provided with inwardl extending ilanges v11, which being disposer longitudinally along their lower edges, form seats for the extremities of transverse, equidistantly arranged T bars 12 which maybe securedtothe stringere by means of angles 13. The upper surfaces of the flanges 11 and of #the constructions shown in Figs. 1 and 2 of the drawings, are produced by molding a' plastic substance such as a mixture of cement and sand, gravel or other substances in a suitably constructed matrix and are reinforced by embedding a continuous sheet of wire Vnetting 22 intermediate their upper and lower surfaces. x 1

, Rods 23, the surface of which is roughened by twisting, are bent in conformit with the body 8 and embeddedin the trea and riser comprised therein, their threaded extremities .extending beyond the latters outer edges, to provide mean's for fastening the use of nuts 24.

By interweaving the rods23 with the wire netting 22, the parts are permanently held in their relative positions while the roughalternate vertical and horlzontal parts 6 and l the wings 12HL of thev T connect-ions, extendstairs to the connecting angle bars 10, by the ened surface of the rods still further secure them in cohesion with the plastic substance in which they are embedded. K

If so desired, the treads of the various stairs comprised in.the structure, may be made separate from the risers, in which case the latter are made preferably Vof metal, as shown in Fig. 3, in which the reference numeral 25 designates the metallic riser hav ing an integral nosing 26, and 27 the reinforced concrete tread supported thereon.

To increase the wearing qualities of the treads 'and toguard against slipping of and consequent injury to ersons mounting or descending the stairs, provide non-slip' ing or safety treads 28 which being embe( ded in or otherwise secured to the material of which the ste s are composed, present a series of space adhesive surfaces to be engaged by the feet of the user and which incidently rotect the nosings 29 intermediate the trea( s and the risers.

-The safety treads 'mayfextend from the nosing 29 along the entire width of the tread as shownin Fig. 1 or they may be disposed as shown in Fig. 2 at the fore portion thereof,

which during ordinary usage is most frequently engaged by the feet of ascending or descending persons.

The appllance 28 is composed of a base plate 30, curved and lianged at one of its edges to form a shield 3l for the nosing 29 of the stair 'upon which it is fastened, and provided with a luralityl of detachably secured, superposeil bars or strips 32 made of lead or other soft metallic substance or com osition. T e shape of the strips 32, as well as theures of which, illustrating the safety tread in detail, w'illnow be described in the order in-which they are presented.

In Figs. 4 and 5 the metallic sheet 30 is unched at regular intervals along double ines, parallel with its outer edge, with a preferably rectangular U-sliaped die, the open end of which leaves a connection between the punched out portion and the main body of the sheet along which the former is subsequently bent to form an upwardly ranging prong or horn 33.

The rectangular perforations produced b the stamping process being arranged albng the two juxtaposed lines in opposite and reverse relation, will thus produce two rows of diverging projections or prongs which collectively form a longitudinal dovetail key or tenon by means of which the soft metal strips 32 are detachably secured upon the late. p The strips 32 which, as hereinbefore ex plained, may be composed of any metallic substance or composition adapted to present an adhesive surface to the tread, are prei'- erably made trapezoidal in cross section and are provided along their under side with a longitudinal key way or mortise 34;, shaped in conformity with the tenon produced by the series of prongs upon the plate 3() by which in practice it is occupied. The strips 32 are thus held upon the plate against lateral displacement and may readily be removed in case of wear or breakage.

The base 30 is, in the above described 1nanner, provided with as many double rows of prongs as are needed to secure the required number ofstrips, and in order to promote the strength of the plate the perforations and intermediate spaces in adjoining series are placed alternately in relation to each other.

In the hereinafter to be described lnodied forms of the safety tread, the angular perforations punched into the plates are substantially alike differing only in the length of their parallel portions and their arrangement in relation to each other.

.ln Figs. 6 and 7, the opposite perforations in the double lines are arranged in reversed. order from those in the receding `figures and the prongs 3.5 producedp by the punched out portions converge to form collectively, a dove.- tail key way 36 for a correspondingly foi-ined tenon 37 longitudinally disposed on the underside of the lead strips 32.

The nose shield 38, shown in Figs. E) and 10, differs from that illustrated in the preceding igures in that its upper edge is brought by an intermediate upright portion 3) in a plane with the upper surface of the lead strips 32 instead of curving downwardly from the upper surface of the base plate.

Both shields 31 and 38 are provided at their lower edges with inwardly turned flanges 3la and 38a which, in practice, protect the under surface of the nose of the tread to which they are applied.

The strips 32 employed in the forin illustrated in Figs. 8 and 9 are identical with those shown in the preceding figures and the perforations are arranged in relation to each other in a manner similar to that shown in Figs. 4 and 5. ln this case, however, the alternate angular slits of each series have been prolonged outwardly and the pimigs 40 and 4l are bent in converging relation to produce collectively two means for securing the soft metal strips, vizz-a keyway 42, similar to that shown in Figs. 6 and 7, to admit the dovetail tenon 35l1 on the bar 32" and a wider keyway 43, the prongs in which are arranged to engage the flaring sides of the said bars.

In the form illustrated in'FigslO and 1], the slits produced bythe punching process, are placed in relation to each other similar to the arrangement shown in Figs. j and 7, but the prongs 44 are bent upwardly in a dip -verging instead ofa'converging position, so they may collectively form a key 'or tenon similar to the one illustrated in Figs. 4 and 5,

Jthe strips employed in the two forms being 5' identical.

efore proceeding with the'idescription ofJl hereinafter -to eexplained are intermediate the bars. The difference between these two classes resides chiefly in the manner in which the plates are applied upon the treads of the stairs, those hereinbefore described `being adapted to be secured by screws .or other means upon any tread irrespective. of the material of which itis composed, be it concrete, wood or iron, while the other apertured plates are especially adapted to be embedded in treads made of plastic material,l the ortions lof which above and below the p ate,

unite into one connected mass by the intermediate openings ormed by the upturned rongs.

f The first form in the last named class of safety treads is illustrated in Figs. 12 and M 13,.in which the strips 32 are made without a key way or a tenon and the prongs 446provduced by the punched out portions Vof the plate 30 are arranged in a manner similar to that shown in Figs. 4, and 5 with lthe differ;

ence that the distance between the op osite 35 prongs of each series has been made arger and the latter-are bent upwardly in con-- verging relation, so as toengage' theflaring sides of the strips.

The alternate prongs 4'7 of each Vdouble 40 row in the plate illustrated in Figs. 14 and 15 are, in arrangement, .similar to those shown 'inthe preceding fi bures, while the inter-mediate ones 49 are.. rought closer togetherfand diverge like those shown in Figs. 4 and 5. The stri s employed are identical to those used in t e last named form, the key ways 48 being adapted to admit the series ofdiverg'ing inner prongs,.while the outer converging ones engage their flaring 5o sides..

The plate shown in Figs. 16 and 17 is similar to the one illustrated in the preceding figures, the only difference being that the innermost prongs 49a converge to collectively forma key way for a dove tail tenon 50 on the strip 32. The outer rongs 51V engage the sides of the strip as in t e other form.

The strips in the structure illustrated in Figs. 18 and 19 are identical to those in Figs.

Y 16 and 17, and the late is also similar with the exception that t e opposite prongs 52 in each series are equidistantly disposed along `parallel lines to collectively form the key way 53 for the tenon 54.0f thestrip.

i In Figs. 20 and21 are illustrated various ortions extending through thev vI claim is modes of securing the stri s upon their base through instrumentality o interposed agents which riveted or otherwise fastened upon the plate, take the place of the punched out prongs of the preceding structures.

In the figures, the reference character a designates a form in which the strips have two parallel dovetail tenons 55 disposed in corresponding grooves 56 in ashoe 57 secured upon, the plate; b shows a structure in which the strip has but one tenon 58 the `sides of which are convex and which -engages a correspondingly sha ed way 59 in a 'shoe 60;*in e the correspon ing sides of the tenon 61 and the way 62 in the shoe 63 are 80 respectively concave and convex while in e they are` flat. The forms shown at d and f include strips having longitudinal key ways 64 and V65'cut in their under sides and reglectivelyhaving flaring and curved sides. 35 rl e means. employed to secure the bars upon the plate consist, in this case, of strips or keys 66 and67, shaped in conformity with the ways in the bars they occupy.

The safety-treads may, as hereinbefore eX- plained, be secured upon the steps by screws or similar fastening means or they may be embedded inthe concrete or other plastic. substance of which the steps are formed and the upper'surfaces of their soft metal mem- 95 bers may be left in se arated condition or they may be connecte by means of linterposed plastic material. v l

Having thus described my invention what 1. 'As a new. article of manufacture, a nonslippingtread comprising a plate adapted to be secured u on a stair tread and having a nosing shiel comprising .a 'downwardly extending portion terminating in an inturned flange and an upright connection intermediate the said ortion and the plate, and spaced face longitudinal ways adapted to admit the said keys.

.3. As a new-article of manufacture, a'non- 115 slipping tread comprising a plate having a plurality of dove-tail ridges upon its upper surface and `bars of soft metal having in their under surfaces correspondin ly shaped grooves adapted to admit the sai ridges.- 1 120 4. As a new article of manufacture, a nonslipping tread comprising a plate having one or more series of punched out prongs, ar-

ranged to collectively form a key or tenon and bodies ofsoft metal having in their un- 1.25

der sides ways adapted to admit thesaid key.

' 5. As a new article of manufacture, a nonslipping tread comprising a plate having one or more series of punched out prongs arranged to collectively form a dove-tail key 13;,

or tenon and bodies of soft metal having in or more series of prongs arranged to collectively form dovetailed ridges and bodies of soft metal adapted to interlock with the said ridges against lateral and vertical displacement.

7. As a new article of manufacture, a nonslipping tread comprising a plate having series of upturned prongs each series comprisin four rows, the inner ones of which form co lectively a key or tenon and the outer ones collectively a way, both of dove tail form and bodies of soft metal within the said way, their flaring sides being engaged by the rongs comprised therein, the said bodies aving key ways arranged to simultaneously receive the said key or tenon.

8. As a new article of manufacture a nonslipping tread comprising a plate havin one or more series of upturned prongs eaci series comprising four rows arranged to collectively form dovetailed ridges and bodies of soft metal adapted to interlock with the said ridges against vertical and lateral displacement. y

In testimony whereof I have allixed my signature in presence of two witnesses.

EDWARD EDMUNI) SCHACHNER.

l/Vitnesses: 4

G. J. ROLLANDET, K. M. STUMP. 

